Checked.
So, here is how I would do it, if I were an evil spook. First, track all image posts that originate from this site. You can automate this. Then all the major traffic sites do the same thing. Censor / Shadowban the users that repost from this site with extreme prejudice. Automate this. Do the same with secondary text phrases from the site. Automate this as well. Bribe administrations of sites you don't already have under your control to enforce these rules for you. Apply this all the way up to the ISP level when it is practical. Build AI scripts for image recognition and optical character recognition into the mix, auto-ban and auto-filter images in that fashion.
Since you already control the major search engines, do the same there as well. Be sure to get your mockingbird faggots to follow the narratives you feed them if someone mentions content from the site.
Get grassroots organizations and controlled opposition to spread their own fake and/or counter narrative as well. Also be sure to villainize the group by hiring and/or mind controlling the occasional crazy extremist to do acts of terror and the like. Then deplatform them from their site using one of the previously mentioned acts of terror. Take control of their previous site name to act as a honeypot, and make sure to try and steal their new site name continuously by using cache poisoning the DNS to point to major tech company sites (which are also honey pot addresses) Do the same to all of the site owner's other businesses just to make sure he suffers. There are more things they did, but i'll stop here.